Quiz 25: Final Review

What is Potential Energy (PE)?

• Energy of motion

• Energy created from nothing

• Stored energy based on position

• Energy lost during transfer

Answer explanation

Potential Energy (PE) is defined as stored energy based on an object's position. It differs from kinetic energy, which is the energy of motion. Thus, the correct choice is 'Stored energy based on position'.

Tags

NGSS.MS-PS3-2

What is Kinetic Energy (KE)?

• Energy of motion

• Stored energy based on position

• Energy that cannot be transferred

• Energy that is destroyed

Answer explanation

Kinetic Energy (KE) is defined as the energy of motion. It is the energy an object possesses due to its movement, making 'Energy of motion' the correct choice. The other options describe different forms of energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

According to the Law of Conservation of Energy, energy is not created or destroyed, only _________

• measured

• transformed/transferred

• multiplied

• reduced

Answer explanation

According to the Law of Conservation of Energy, energy is not created or destroyed, but rather transformed or transferred from one form to another. This makes 'transformed/transferred' the correct choice.

Tags

NGSS.MS-PS3-5

What is Energy Transfer?

• Energy is destroyed

• Energy moves from one object to another

• Energy is created

• Energy stays in one place

Answer explanation

Energy transfer refers to the process where energy moves from one object to another, such as when heat flows from a hot object to a cold one. This is the correct understanding, as energy cannot be created or destroyed.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In pendulum motion, at which positions is the Potential Energy (PE) at its maximum and Kinetic Energy (KE) at zero?

• Positions 2 and 4

• Position 3 only

• Positions 2 and 3

• Positions 1 and 5

Answer explanation

In pendulum motion, Potential Energy (PE) is maximum and Kinetic Energy (KE) is zero at the highest points of the swing, which are Positions 1 and 5. At these points, the pendulum momentarily stops before reversing direction.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

In pendulum motion, at which position is the Kinetic Energy (KE) at its maximum and Potential Energy (PE) at zero?

• Position 1

• Position 2

• Position 4

• Position 3

Answer explanation

In pendulum motion, Kinetic Energy (KE) is maximum and Potential Energy (PE) is zero at the lowest point of the swing. This occurs at Position 3, where the pendulum is at its lowest height.

Kinetic Energy increases from position 1 to 3 and decreases from position 3 to 5

• True

• False

Answer explanation

Kinetic Energy increases from position 1 to 3, indicating a gain in energy. From position 3 to 5, it decreases, showing a loss of energy. Therefore, the statement is true.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

True or False: The total energy in a pendulum changes as it swings.

• True

• False

Answer explanation

The total energy in a pendulum remains constant as it swings, converting between potential and kinetic energy. Therefore, the statement is False.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The distance a pendulum travels from position 1 to 3 is ________ the distance it travels from 3 to 5 on the first swing.

• exactly the same as

• twice as much as

• half as much as

• less than

Answer explanation

The distance a pendulum travels from position 1 to 3 is exactly the same as the distance it travels from 3 to 5 on the first swing, as the pendulum moves symmetrically in its swings.

If a student does the pendulum experiment and moves forward after releasing it, what will happen?

• It will hit the student in the face since they moved forward and it will return to the same original position which was further back

• It will NOT hit the student in the face since they moved forward and it will return to the same original position which was further back

• It will stop swinging before it goes back to the original position

Answer explanation

When the student moves forward after releasing the pendulum, it will swing back to its original position. Since the student is now closer to the pendulum's path, it will indeed hit them in the face.

Tags

NGSS.MS-PS2-2